Brazilian President LuizInacio Lula da Silva underwent a second procedure following his emergency brain surgery earlier this week, his doctor said, adding the operation was successful.
"The president is awake and speaking," Roberto Kalil Filho told reporters
The 79-year-old president's doctor said the operation would involve inserting a catheter in Mr Lula's femoral artery, and added that the procedure was "relatively simple and low-risk."
Hospital Sirio-Libanes added that Mr Lula was otherwise well.
Yesterday, it said, he "carried out physiotherapy, walked and received family visits."
Doctors performed emergency surgery on Mr Lula to relieve pressure on his brain from bleeding in cranial membranes linked to a fall he had in October, in a bathroom at the presidential residence.
After complaining of a headache in Brasilia on Monday, an MRI scan found a haemorrhage between his brain and the dura mater membrane that protects it.
He was rushed to the Hospital Sirio-Libanes - the country's top medical facility - where doctors carried out a trepanation, involving drilling through his skull to relieve pressure.
The hospital said Mr Lula was alert and had "progressed well" since the surgery, "without incident."
In a post-surgery news conference, his medical team said he had suffered no brain damage.
They said he would spend a couple of days in intensive care, under observation, and he was expected to be released from hospital next week.
After the fall on 19 October, Mr Lula told an official from his Workers' Party that the accident had been "serious".
In the weeks following, the president skipped planned overseas trips.
But from mid-November he resumed his active schedule, hosting a G20 summit in Rio and attending a Mercosur summit last week in Uruguay.
